Question

Suppose y varies directly as x. If y = 150 when x = 3, find y when x = 5.

Answer 1

To find y when x = 5, we can use the next proportion:

`(150)/(y)=(3)/(5)`

Solving for y:

`\begin{gathered} 150\cdot5=3\cdot y \\ (750)/(3)=y \\ 250\text{ = y} \end{gathered}`